ALADYN: a web server for aligning proteins by matching their large-scale motion.

Area of Science:

• Structural biology
• Computational biology
• Bioinformatics

Background:

• Protein structure alignment is crucial for understanding function.
• Traditional methods based on sequence or static structure may miss functional insights.
• Large-scale protein movements often correlate with functional conformational changes.

Purpose of the Study:

• To introduce the ALADYN web server for protein structure alignment.
• To enable the detection of functionally relevant correspondences through dynamics comparison.
• To provide a tool that complements existing sequence- and structure-based alignment methods.

Main Methods:

• Utilizes an elastic network model to calculate protein structural fluctuations.
• Maximizes the similarity of fluctuation patterns to determine optimal molecular positioning.
• Employs a dynamics-based approach for aligning protein structures.

Main Results:

• The ALADYN server successfully aligns protein pairs based on internal dynamics.
• Identifies regions exhibiting similar large-scale movements, indicative of functional relationships.
• Provides quantitative indicators and downloadable data for analyzed alignments.

Conclusions:

• ALADYN offers a novel dynamics-based method for protein structure alignment.
• This approach can uncover functional correspondences not apparent through conventional methods.
• The web server is freely accessible, facilitating broader research applications.